Lighting fixture accessory



FIG. 1 is a perspective view showing the ornamental design of the lighting fixture accessory;

FIG. 2 is an illustration provided herein as a visual aid, depicting a perspective view with the top portion removed showing the features underneath;

FIG. 3 is a bottom view of the lighting fixture accessory;

FIG. 4 is a top view showing the ornamental design of the lighting fixture accessory; and,

FIG. 5 is a side view showing the ornamental design of the lighting fixture accessory.

The broken lines depict portions of the lighting fixture assembly that form no part of the claimed design. 

CLAIM The ornamental design for a lighting fixture accessory, substantially as shown and described. 